ComboBox - Finger Friendly Possible?

Hello All,

I have created an application that uses drop-down combo boxes to populate a database on a 6.1x device. However, I despise the need to pull out the stylus in order to click on the tiny down-arrow on the combobox that then shows you the combobox contents. Is there an easy way to make these boxes "finger-friendly"? A simple method for resizing the drop-down "arrow" / list choices, for example.

Thanks all, Magohn

you can change the width of the scroll bar, and the height of the button by looking at the registry entries
HKEY_LOCAL_MACHINE\System\Gwe\cyVScr
HKEY_LOCAL_MACHINE\System\Gwe\cxVScr

The first is the height of the button - try 20 and the second is the width of the scroll bar - try 20 again

However, this is a global change, and effects all of the sytem - so be warned.

Alternately, design your own button, and put that over the arrow, and on click, progamatically dropdown the combo

Quote:

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Originally Posted by petevick

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Alternately, design your own button, and put that over the arrow, and on click, progamatically dropdown the combo

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I like this idea - thanks. I created a button and thought I would use the following to toggle the dropdown list:

Code:

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MyBox1.DroppedDown = Not MyBox1.DroppedDown

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Unfortunately this is yet another unsupported ability in .NET as I get the following build error:

Code:

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Error        1        'DroppedDown' is not a member of 'System.Windows.Forms.ComboBox'.

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Any ideas to get around this appreciated...

Hi,
you need to use sendmessage.

Code:

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Private Const CB_SHOWDROPDOWN As Integer = &H14F
    Declare Function SendMessage Lib "coredll.dll" (ByVal hWnd As IntPtr, ByVal Msg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As IntPtr

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then on the button click do

Code:

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SendMessage(ComboBox1.Handle, CB_SHOWDROPDOWN, 1, 0)

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Thanks so much - again :) - worked like a charm.
Is there a book or reference that lists pieces of code such as this? I can find numerous references to VB6 but very little on .NET ...

Thanks again, Magohn :)

This forum usually has lots of hints.

What you can't achieve directly in .Net CF, there is usually a way round it - this being a prime example. SendMessage is very powerful.

Take a look at pinvoke.net - that is a treasure trove for API definitions and how to use them.